Top answers

Chemistry
A Level

Explain the trend in first ionisation energies across a period.

There is a general increase in the ionisation energy as we move across a period. This is because the the number of shielding electrons is constant and the atomic number increases, which means the effect...

Answered by Kealan S. Chemistry tutor
2029 Views

Why does ionisation energy increase across a period?

As you go across the period, the nuclear charge (or number of protons increase) but the shielding (or the number of shells) stays the same as all of the elements are on the same period. This causes the nu...

Answered by Anjali P. Chemistry tutor
1711 Views

When vaporised, isotopes of an element can be separated in a mass spectrometer. Name the three processes that occur in a mass spectrometer before the vaporised isotopes can be detected. State how each process is achieved. (6 marks)

Once the sample is vaporised, high energy electrons are fired at the sample which knocks off a loosely held electron. (1) This step is known as election impact ionisation. (2) Due to the presence of a cha...

Answered by Madalina F. Chemistry tutor
4000 Views

How do you classify an alkene using Cahn-Ingold-prelog rules

First, look at each of the groups connected to the two carbon atoms in the double bond. Rank these groups by priority based on the atomic mass of the atom connected to the alkene carbon. If both of the he...

Answered by Leon M. Chemistry tutor
1901 Views

How does the electronegativity of the halogen atom change as group 7 is descended?

Electronegativity is the measure of how strongly an atom attracts a bonding pair of electrons to itself. As group 7 is descended, the electronegativity decreases. This is because the size of the halogen a...

Answered by Serene T. Chemistry tutor
14049 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences